Hello Mike,
 
 MB> OS/2 handles locking by byte offset within a file.  
 MB> It knows nothing about records, which are details 
 MB> of organization imposed internally by your program.

 EH> Share under WIN/OS2 would not let me lock them all. Is it so 
 EH> that I can only lock one record or subsequent area at a time?

 MB> Are you writing a native OS/2 program or a DOS/Windows program?
 
Well actually, both, since the interface code of the program is very
different, but the libraries incorporating the functionality of the program
are the same. So I would like to be able to write the same program under
Windows (as costumers demand it) and under OS/2,  as I demand to use it
myself. 
 
But at the moment I am using the windows version of this program and I had
the idea that I am unable to lock two or more different regions at the same
time.
I would like to lock byte-regions: 50-100 and 500-600 at the same time,
since it is a database, of which I am altering records at the same time.
When altering a record, I want to lock it from read and write access, so
that no other user can make the mistake to alter the contents while I am
too. Thereby, nobody can read the record, so no-one can base his decisions
on the wrong information, as I am just updating the info.
 
Hope to be clear this time,
 
Erik/2

--- Maximus 2.01